Water Heater Replacement Cost Calculator
Water heater replacement cost runs $1,100 to $2,400 for a like-for-like gas or electric tank, and two to three times that for a heat pump or tankless conversion. The unit is often the smaller half of the bill. What decides the rest is your local labour rate and the code-driven work nobody mentions until the quote arrives: an expansion tank, a drain pan, strapping, new venting.
Estimate the cost for your home
Estimated cost to replace a water heater
$1,772
typical · range $1,108 to $2,436
Labour priced at national wages. Enter a ZIP code to price it for your area. 86% of this figure comes from modelled material prices — each line shows its own uncertainty.
Priced from bls.gov Aug 2026how every line is sourced
The one input that changes the answer for you.
The most common replacement. Burns gas, stores hot water in a tank.
Whatever is on the label of the one you are replacing.
1 / 3
The figure above is already calculated. Each step just makes it more yours, and you can stop at any of them.
| Line item | Qty | Cost | Source |
|---|---|---|---|
| Gas storage water heatertank capacity in gallons | 50gallon of capacity | $650–$1,500 | estimated±40% |
| Plumber: remove old unit, set and connect new one4 hours for a tank swap, 6 for a heat pump, 11 for a tankless conversion (modelled) | 4hour | $238–$256 | sourced |
| Flexible water connectors, unions and shutoff1 lot per installation | 1lot | $45–$140 | estimated±51% |
| Temperature and pressure relief discharge pipe1 on storage units | 1lot | $25–$70 | estimated±47% |
| Gas flex connector and sediment trap1 on gas appliances | 1lot | $35–$110 | estimated±52% |
| Thermal expansion tank1 where the supply is a closed system | 1each | $55–$180 | estimated±53% |
| Haul away and dispose of the old unit1 per replacement | 1each | $60–$180 | estimated±50% |
| Total | $1,108–$2,436 | ±37% |
Where these numbers come from
- Labour rates by area
- BLS Occupational Employment and Wage Statistics, May 2025, for plumbers and electricians in your metropolitan area. Retrieved 2026-08-20. Employer benefit costs from BLS Employer Costs for Employee Compensation.
- Equipment categories
- The five categories follow the federal definitions used by ENERGY STAR, Residential Water Heaters Key Product Criteria, not a grouping of our own. Retrieved 2026-08-21.
- Why efficiency rules show up on the invoice
- Federal efficiency standards, measured under the DOE uniform test method (10 CFR 430, Subpart B, Appendix E), changed what a modern unit needs around it. That is why a replacement sometimes will not connect to an old flue the way the one it replaces did, and why venting appears as its own line. Retrieved 2026-08-22.
- Material prices
- Modelled estimates, not sourced prices. No public, machine-readable source of US residential material prices exists, and we would rather say so than pretend otherwise. Each line carries its own uncertainty band. How we estimate them.
Contractor overhead and profit applied at 33–43% over direct cost. Data last reviewed 2026-08-21.
What this figure does not include
- Permit fees and inspection
- Most jurisdictions require a permit to replace a water heater, and the fee varies enormously by city with no national source. Excluded from every figure on this site and stated rather than averaged. Expect tens to low hundreds of dollars.
- Electrical panel or service upgrade
- If your panel has no spare capacity for a heat pump or electric tankless, that is a separate project several times the size of this one. The electrical lines here cover circuits, not a new service.
- Moving the water heater to a different location
- Relocating means new supply, drain, vent and possibly framing. This models replacing the unit where it already is.
- Utility rebates and tax credits
- Heat pump water heaters often attract them, and they can be substantial. They are excluded because they vary by utility, change without notice and would make the figure look better than what you will actually be quoted.
- Water treatment, repiping and pre-existing faults
- Hard water, failing supply pipe or a leaking shutoff found on the day are separate work.
Questions people actually ask
Why do plumbers charge so much to replace a water heater?
Because most of the bill is not the plumber's time. A typical swap is four hours of work, and the invoice covers the appliance, the parts, hauling the old tank away, and whatever the code has changed since the last one went in. On the labour itself, the wage the plumber takes home is roughly $30.67 an hour nationally; add employer benefit costs, which the government measures at about 46% on top, and the company's overhead and profit, and the billed rate is several times the take-home. The calculator above splits all of it out so you can see which part you are actually questioning.
What's the average price of replacing a hot water heater?
A like-for-like gas or electric tank swap usually lands between about $1,100 and $2,400 installed, with most jobs near the middle. Heat pump and tankless replacements run roughly two to three times that, mostly because of what they need around them rather than the unit itself. Where you live matters: labour is about half the bill on a simple swap, and plumber wages vary by more than fifty per cent between US metropolitan areas. Put your ZIP code in above and the figure adjusts.
What is the average labor cost to install a 50 gallon gas water heater?
Four hours of plumber time is a fair allowance for a straightforward like-for-like replacement, and the calculator above prices those hours using the Bureau of Labor Statistics wage survey for your own metropolitan area rather than a national average. Two things push it higher: a difficult location such as an attic or a tight crawlspace, and code-driven work that is not really installing the heater at all — new venting, a drain pan, an expansion tank. Those are itemised separately above rather than hidden inside a labour figure.
How many years does a hot water heater typically last?
Manufacturer warranties on storage tanks generally run six to twelve years, and that warranty length is a reasonable proxy for expected life, because it is the manufacturer pricing its own risk. Tankless units are usually rated longer. Water chemistry is the main variable: hard water shortens tank life considerably, and an anode rod replaced on schedule extends it. If yours is past its warranty period and still working, budgeting for replacement before it fails is cheaper than replacing it in an emergency, when you have no time to compare quotes.
Taken from Google’s “people also ask” results for this search on 21 August 2026, not invented.
Other cost calculators
The first of these are the jobs closest to this one — the ones that turn up in the same quote, or instead of it.
- Tankless water heater installation cost
Sizes the unit from your flow and how cold your water arrives, then prices the gas line, the flue and the circuit that a storage tank never needed.
- Water softener installation cost
Sizes the unit from your actual water hardness and household size, and shows why a house without a softener loop costs twice the plumbing labour.
- Septic tank replacement cost
Sizes the tank and drainfield from state code using your bedroom count and perc test, then prices excavation, materials and four trades for your area.
- Boiler replacement cost
Prices a boiler line by line and answers what nobody sells you: whether your radiators will ever let a condensing boiler actually condense.
- The full water heater replacement cost dataset
Every unit price, every quantity rule and the reasoning behind each estimate, as a plain table.
- How we calculate
The formula, the sources, and an honest account of which parts of the model are weak.